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Routine use of colonoscopy screening varies globally. In the US, colonoscopy is a commonly recommended and widely utilized screening method for colorectal cancer, often beginning at age 45 or 50, depending on risk factors and guidelines from organizations like the American Cancer Society. [9] However, screening practices differ worldwide.
A colonoscopy is the “gold standard” of tests to screen for colorectal cancer and can discover approximately 95% of colorectal cancers. It is also the only option that lets a ...
Colonoscopy is the gold standard for colorectal cancer screening, since it can detect not only cancerous tumors, but precancerous polyps that can be removed before they can turn into cancer.
Traditional colonoscopy is the most comprehensive type of colorectal cancer screening, but noninvasive options have their advantages. Virtual colonoscopy lets you skip the scope.
Screening has the potential to reduce colorectal cancer deaths by 60%. [119] The three main screening tests are colonoscopy, fecal occult blood testing, and flexible sigmoidoscopy. Of the three, only sigmoidoscopy cannot screen the right side of the colon where 42% of cancers are found. [120]
Screening for colorectal cancer, if done early enough, is preventive, seeing as benign lumps called polyps in the colon and rectum are the start to almost all cases of colon cancer. These polyps can be identified and removed by screening tests like a colonoscopy , in which the whole colon is visible.
CT scans and ultrasounds are now the tests of choice for the initial evaluation of abdominal masses, and colonoscopies are becoming the standard for routine colon screening for those over age 50 or with a familial history of polyps or colon cancer, although it is not uncommon for a barium enema to be done after a colonoscopy for further evaluation.
The Food and Drug Administration on Monday approved Guardant Health’s blood test, called Shield, to screen for colon cancer.
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